remove most usages of std::make_pair

[neheb]

Better alternatives exist with C++11.

Signed-off-by: Rosen Penev rosenp@gmail.com

[codecov]

Codecov Report

Merging #1874 (4030f82) into main (079f130) will decrease coverage by 0.01%.
The diff coverage is 52.94%.

❗ Current head 4030f82 differs from pull request most recent head e7eddfc. Consider uploading reports for the commit e7eddfc to get more accurate results

@@            Coverage Diff             @@
##             main    #1874      +/-   ##
==========================================
- Coverage   60.77%   60.76%   -0.02%     
==========================================
  Files          96       96              
  Lines       18887    18887              
  Branches     9498     9493       -5     
==========================================
- Hits        11478    11476       -2     
  Misses       5116     5116              
- Partials     2293     2295       +2     

Impacted Files	Coverage Δ
include/exiv2/types.hpp	68.57% <0.00%> (ø)
src/epsimage.cpp	1.67% <0.00%> (ø)
src/tiffvisitor_int.cpp	75.75% <50.00%> (ø)
src/exif.cpp	65.90% <100.00%> (-0.33%)	⬇️
src/iptc.cpp	64.61% <100.00%> (-0.39%)	⬇️
src/tiffcomposite_int.cpp	74.32% <100.00%> (ø)
src/types.cpp	91.44% <100.00%> (ø)

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